Winding of yarn or thread packages



Oct. 3, 1933. A. H. TIDMUS WINDING OF YARN OR THREAD PACKAGES Filed 001:. 29, 1930 ALLAN H T\DMUS mvemon j yf i/w ATTORNEYS Patented oct. 3,1933 l a i I 1,928,708

hurrah STATES p 5 "OFFICE,

. INDING or YARN R THREAD PACKAGES T Allan Hinds Tidmus, Spondomnear Derby, England, assignor to Celanese Corporation of America, a corporation of Delaware Application October 29, 1930, Serial vNo. 491,888,

and in Great Britain January 3, 1930 Y Claims. (01. 118-62) This invention relates to the production of an orbital path around the package, so thateach twisted yarn or thread, and has for its object an turn of the thread bears over and secures the improved method of forming packages of twisted preceding turn. Thus, the point of contact of the yarn or thread in cap-spinning operations. thread with the edge of a cap-spinning device,

[ Hitherto, in the production of packages of from which the thread is guided to the package, on;

twisted and wound thread by means of capmay oscillate up and down in the direction of the spinning devices, the thread has usually been laid axis of the package, such oscillation occurring at on the bobbin with a slow traverse from one end least, once, in each revolution of the said point of of the bobbin to the other, this traverse being contact in its orbit'round the package. For exeffected by relative motion in the direction of the ample, there may be useda cap whose edge ises;

bobbin axis between the cap" and the bobbin. In formed otherwise than in a plane at right-angles the case ofthreads fed to the bobbin at a high to the axis of the cap.- The thread is laid on the linearspeed, the package-building traverse along bobbin from successive points along the cap edge, the bobbin' axis is so slow relatively to the rate at and according as these points occ py ahigher or which the thread is wound on the bobbin-that lower position with respect to the bobbin so ls the 70 each thread turn is practically in a plane at rightthread laid at a higher or lower position on the angles to the, bobbin axis, i. e. substantially bobbin. l i i parallel winding results. In this form of pack The package produced in this way consists of age'the turns of each layer are substantially layers of thread, each turn of which is ofan parallel to thecturns of the layer beneath, and undulatory character, several oscillations or 76. trouble has been experienced from the fact that waves of smallampli' rrin in a tu the turns of thread tend to slip in between the The amplitude of the oscillationswill be smaller turns of the layer beneath, andto becomejammed than the amplitude of the oscillation of the there. This is especially the case with dry-spun means. for guiding the thread on to'the bobbin artificial threads which are produced and wound to an e te t dep d on h di of the 80, at a highlinear speed, and, further, are of a said means from the thread surface on the bobsmooth and slippery nature, which allows the bin. The length of each oscillation or. wave will turns to slip easily between the turns over which also be smalL, be g q a a the m st 130 the they are wound. Theresult is that the jammed length thread laid on he n nr e i .30 thread tends to break during subsequent unwindtime'in which the thread revolves around the 8 5" ing operations, causing delay and wastage of the bobbin axis. At'least one oscillation will occur thread. a for each twist of the thread and several twists Building of the package by cross winding, i; e. n r y. cur in hturn of thread laid on traversing the thread along the bobbin sufiiciently the bobbin. ,The oscillations in the thread turns,

35. rapidly to obtain a wind whereineach turnof though small-in amplitude are, however, sufficient thread crossesthe turns of the layer beneathat to cause the-turns to cross those of the layer an appreciable angle would, of course, avoid the n h, so preventing them from pp w en difficulty, but it is not convenient to employ the the previous tllrns- If the Speed at Which the rapid traverse necessary to 'give the cross-wind in thread is f d 0 t e bobbin is comparative y low,

40 twisting and-winding operations in which threads a h turn of layer Will be Separated w at are delivered to the twisting device at a high from a ja n rn o the m y r, but if linear speed, I V the speed of feeding is high, the turns of each The objector the presentinvention is to build' ay y e sufficiently close together h by a threadpackage in the course of a cap-spinning IeaSOnOf the Oscillations OIWEIWGS in the turns,

45 or like twisting and winding operation, which each turn overlaps one or'more previous turns package possesses the advantages of a cross of the Same layer along Some Dari? of s ength. wound package, without resorting'to the rapid The invention is particularly applicable to the traversing necessary to produceatrue cross-wind. winding and tw t of Yarns ds 00n- According to the present invention a small tinuously with the production, and is especially 5 cross-wind efiect is imparted to a thread in a app a the Winding d twisting, of artitwisting and winding operation by causing the fi ial yarns, filaments 0r threads p du d y point of contact of the thread with means serving e d y v p ve et edto guide the thread on to the package to follow an The inventionwill now be described in greater oscillating motion in the direction of the axis of detail with respect to the accompanying drawing,

5 the package as the said point of contact describes but it is to be understood that the following de- V scription is given by way of example only and' is in no way limltative.

Fig. 1 is a front elevation of a cap-spinning device according to the invention, showing the manner in which the thread is wound on to the bobbin;

Fig. 2 is a side elevation of the cap-spinning device shown in Fig. 1; and

Fig. 3 is a representation to an increased scale of the winding effect produced. 1

The apparatus employed for production of the thread may conveniently be of the type described in U. S. Patent No. 1,731,317, the thread of filaments of cellulose acetate or other. cellulose derivative being led from the spinning cell, passed over suitable lubricating or other wicks, if desired, and round a feed roller or godet to a bal-' loon guide, from which guide it is led to a capspinning device as shown in Figs. 1 and2.

In Fig. 1, the thread 6 passing to the package 7 passes over the annular edge 8 of a spinning cap 9, whlch'edge 8 instead of being in a plane at right-angles to the axis of the package 7, is

inclined to that axis to such an extentthat one side of the edge is at a'height of, say, or /3" above the other. The thread then passes from the edge 8 to the package 7.

The package 7 is rotated at a peripheral speed considerably higherthan the rate at which the thread 6 is delivered to the bobbin and the thread is thus caused to rotate as a balloon round the cap 9. the drag imposed by the resistance of the air and by friction with the-cap edge 8 causing the balloon to lag behind the-bobbin somewhat tocause the thread which has been twisted by its rotation to be laid'on the package 7.

During each revolution of the thread 6 around the cap 9'the pointof contact of the thread 6 with the edge 8 of the cap makes a complete oscillation in a vertical direction, while a small length of the twisted thread is laid on the package. This length takes a wavy form as shown by the full line 10 and overlaps the turns of thread in the layer beneath, one turn of which is shown by the dotted line 11, any tendency of the length 10 to slip between the lower turns thus being overcome. This wavy or undulatory winding is additional to the normal traversing wind which is also shown by a slight inclination of the thread from left to right.

Instead ofthe edge of the cap lying in a plane inclined to the axls'of the cap, it may haveany other suitableform' adapted to cause the thread to oscillate. dotted line at 12 in Fig. 1, the edge of the cap continuing almost horizontally from its lowest point, then rising fairly steeply, and finally running almost horizontally to its highest point.

One such form is shown by the passes to the cap edge may be placed vertically above the 'cap spindle, or, in order to maintain the balloon uniform and to avoid tension fluctuations, the guide may be displaced to a point 15 in or towards the axis of the plane bounded by the cap edge. 7

In Fig. 3, which shows to an increased scale the manner in which the thread is wound on to the bobbin, the turn of thread being wound is shown by the full line 10 and it will be seen that this turn overlaps the turns of the preceding layer, one such turn being shown by the dotted line 11. The next winding turn 20 of thread immediately following the turn 10 is shown in broken chain line and overlaps the turn 10 of the same layer as well as turns 11 of the preceding layer.

What I claim and desire to secure by Letters Patent is:

l. Cap-spinningapparatus for winding pack- 05 ages of threads having a cross wind effect, comprising a spindle adapted to carry a rotatable tube bearing a package support, and a cap adapted to flt over said spindle so as to depend round said package support, said cap having a lower edge which as a whole does not lie in a plane at right angles to the axis of rotation of the package.

2. Cap-spinning apparatus for winding packages of threads having a cross wind effect, comprising a spindle adapted to carry a rotatable tube bearing a package support, and a cap adapted to fit on said spindle so as to depend round said package support, said cap having a lower edge which as a whole does not lie in a plane at right angles to the axis of the cap.

3. Cap-spinning apparatus for winding packages of threads having a cross wind effect, comprising a spindle adapted to carry a rotatable tube bearing a package support, and a cap adapt- 125 ed to fit over said spindle so as to depend round said package support,said cap having a lower edge lying in a plane inclined to the axis of the cap.

4. A cap for cap-spinning apparatus comprising a tubular member open at one end, said end terminating in an annular edge which as a whole does not lie in aplane at right angles to the axis of the cap.

5. A cap forcap-spinning apparatus comprising a tubular member open at one end, said end terminating in an annular edge lying in a plane inclined to the axis of the cap.

ALLAN HINDS TIDMUS. 

